A new study polled married people and found that, on average, it took them just 172 days to decide that they wanted to get hitched.

That’s about six months — and it’s less time, the scientists found, than most people estimate they’ll need before making that big call.

Surveyed singles told the researchers that they’d need about 210 days to make up their minds about their potential suitors.

“Romantic partners might incorrectly assume that deciding to tie the knot is a lengthy and deliberative decision,” Nadav Klein, a PhD student at the University of Chicago and co-author of the study, tells The Post. “Our findings suggest that people misunderstand how quickly they make judgments.”

His team’s study, which was conducted on 2,000 coupled and uncoupled people, delved deeper into how long it takes people to make decisions. Participants told researchers that it took five bad interactions before they realized they disliked someone. But the data suggests that three bad impressions is enough to decide “Thank U, Next.”

Joe Taravella, a psychologist and therapist, says Klein’s findings are consistent with his professional experience.

“After the three-month honeymoon period, people tend to let down their guards and you begin to get a true glimpse of the real person and how they deal with the good and bad and everything in between,” Taravella, who’s based in NYC, tells The Post.

He says to trust your gut when deciding whether or not to stay in a new relationship.

“People are constantly showing you who they are, so just be aware of what you see and how someone is behaving toward you and especially others,” he said.

“If you see things in your partner that is not aligned or meeting your needs, it’s best to just move on in your search for true happiness.”